COLOMBO, Sri Lanka Police said they found hundreds of sticks of explosives in a truck that was trying to enter the Sri Lankan capital late Monday night.

Police discovered the 498 sticks of gelignite — an explosive similar to dynamite — during a random search of vehicles entering Colombo from Nawagamuwa, north of the capital, senior superintendent K. Udayapala told The Associated Press.

Six people were being questioned and an investigation has been launched, he said. He had no further details.